Oil pump



C. 15, 1935. A. W F' MANZEL ET AL 2,017,155

' I OIL PUMP Filed Jan. 2, 1932 Sheets-Sheet l K z www1/ml) 1, ,e EL d I I V u -l ai. 'i

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A. W. F. MANZEL ET AL.

OIL PUMP Filed Jan. 2, 1952 @et l5, 1935.

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Patented oct. 15, 1935 NITED STATES PATENTHOAFFICE OIL PUMP' Adolph W. F. Manzel, Buffalo, and Williaml o. HQ

Pfeil, Ebenezer, N. Y., assignors to ManzelBros, Co., Buffalo, N. Y.,a. corporationv ofy New York Application January 2, 1932, SeravllNdi 584,404 f 7 claims. (01.184427) .units being provided which are adapted to be connected to the respective parts to be lubricated.

Another object of our invention is to provide new and novel means for maintaining one of ,the pistonV plungers of a pumping unit in adjusted position, and thereby assure the `feeding of a Ypredetermined quantity of oil from the pumping unit of which the p-iston plunger forms part.

Another object of our invention is to provide new and novel means for actuating the primary plunger oi the Vdevice and to provide means for establishing and maintaining any degree of idle motion for the same during the operative stroke of the actuator before Vcausing actuation of said plunger. Y

With the above objects in View, our invention consists in the novel features of construction, and in the arrangement and combination of parts 'to be hereinafter described and more particularly pointed out in the subjcined claims.

The accompanying drawings illustrate our invention.

Fig. l is a side elevation of our improved lubricating device.

Fig. 2 is an enlarged transverse section taken on line 2 2, Fig. 1.

Fig. 3 is a fragmentaryA horizontal sectiony taken on line 3--3, Fig. 2; the section being taken through one of the pumping units or elements only.

Fig. 4 is a horizontal section taken on line d--fl, Fig. 2.

Fig. 5 is a horizontal section taken on line ,ri-5, Fig. 2.

Fig. 6 is a vertical section taken on line `(5m-5, Fig. 2.

Fig. 7 is a vertical section taken on line '1 -l, Fig. 2.

8 is a Vertical section through a portion of a pumping unit or element, through the outlet coupling and the removable valve cages; the section being on the same plane as Fig. 2, but showing the lower valve cage provided with a by-pass.

Fig; 9 is an enlarged bot-tom View of one of the valve cages...r 1

Fig. v10 isa plan' view-of one of the resilient valve-retainers. Y

Havingjreferenceto Ithe drawings in detail, 5 lglfdesignates` a casing which, although shown rectangular'inY form, may be otherwise shaped, and whileVV the device is capable of pumping or feeding:r lubricant of various kinds we will here'-A inafter, for convenience of' description, refer to 10 to theY lubricant as oil; The casing serves as a container forthe' oil', which .may be introduced into theY container toan'y desired level.

The casing or oil container comprises a bottom wall l2, side Walls iz3',and end Walls I4. The 15i side and end walls have'inwardly-directed flanges l 5 at their upper ends and' 'a cover I6. is applied to the. open upper end of the casing or container, the anges I5 being held rigid by a com-V parativelythick backing plate I1 applied to the 20V two such units or'elements.` Each pumping unit 30:A

includes a casting, preferably comparatively narrowV 'and long; eachfcasting being disposed trans` versely l 'and having `its vends resting upon the 'cover' at opposite sides of the opening 20.

Through the extremities of each pumping unit v or element, fastening screws 22 are passed; these screws being passed. through'the cover I6 and throughf'opposite iianges I5 and being threaded into the backing plate I1 applied to the Vunder side of the' anges. In this manner'the pump- 40 ing u nits or elements ca n be easily introduced into the casing, or removed therefrom for repairs rreplac'ements, ask may be found neces-g sary.' Each of said castings, or pump casings as theyv may also Vbe termed, projects into the oilA casing or' container and vis provided with two depending portions 23, 24, respectively, and vertical bores25, 26 are reamedor Yotherwise formed in the pump casing so that they extend centrally through the projections 23, 24, respectively; the

sure and stop cap 29 is threaded into the upper screw-threaded portion of the well 21, and has an outstanding flange 30, between which and the upwardly-facing shoulder or gasket seat 28 a gasket 3l of desired thickness is placed, which is compressed upon tightening the closure and cap 29 so as to prevent leakage of oil at this point. Y

By enlarging the upper portion of therbore 26, an upwardly-facing shoulder or valve-seat 32,

preferably upwardly flared, is provided therein;v said seat having a ball valve 33 Vnormally .seated4 thereagainst. While the Vball valve may be. of.A

suilicient weight to assure its `proper seating,V we preferably arrange above thefsameaweight and stop pin 34 which extends intotherhollow cap29, and is prevented from tilting measurably by the wall of said cap, especially-sinceihe upper =end of said pin is diametricallyV enlarged within/the cap; the lower end 4 o f said pin being preferably concavedso that it conforms itof-'thefballvalve on which it rests. Upward movementof this weight and stop pin is limited bythe topi Wall .of thehollow cap 29, and consequently the opening move` ment of the ball valve .is correspondingly limited. The pump casing is vertically bore'dfrom its lower surface upwardly; fas' at235, andtheupper.

end of this vertical bore 35 isvin communication with the bore 26 through the medium-of a horizontal passage or.A portv 36.:

Threaded into'the bore 35 from bottom. of;

the pump casing is a nipple 31;V thebore ofzwhich is flared at its upperend tofprovideaseatfor.af

ball valve 3S which closes the '.'upperendsof the nipple. An inlet'pipe39fis secured tofthe lower end of the nipple 3.1 andextends downwardlyto a point near thebottom ofithe casing where: it is` screw-'threadingly entered .into a nipple40* tted into a valve cageor casing 4I.V Thisivalve cage or casing has a valvelseat 42..formed therein from which an inlet opening V43 extendsdownwardly,

through the Aunder side ofethe .valve casing..,=.

The nipple 40 is notched ,or:slottedati its inner.

end, as at 44, and within the valve casing 4I a ball valve 45 isarranged which normally is seatedV against the valveseat 42, and when drawn upwardly will engage the lower end of the nipple 4D and may close the bore thereof; however, oil entering the valve casing undersuction is ,drawn upwardly through the nipple 40 and inlet pipe 39, by reason of the-notches or'slot's remaining uncovered by the yalve.;'I'hevalve being .of

smaller diameter than the interior diameter of the valve casing permits oil to pass .around it and enter the nipple through the notches or slots 44.1

In order to strain the oil before entering the valve casing 4 l it is passed through a foraminous sheath or hood 46 placed over the valve casingV and secured thereto-by means of .awire 4,1-, or in any other approved manner.

The lower or small portion of.; the bore"26 endV and it is frictionally retained within'the cylinder by a spring Vtension o r brake-device 50, best illustrated in Fig. 5. 'Ihis spring tension-device `is in the form of a U-shaped spring. ;5l,{havii1g at opposite ends friction pins 52 secured thereto which areY passed through diametrically opposite openings 53 in the cylinder and bear with their free ends against the plunger 48. 'I'hese friction pins preferably have their inner ends concaved 5 to conform to the peripheral surface of the piston plunger and they may be'riveted or otherwisesecured to the U-shaped spring 5I. Due to the nature of the .tension applied by said U- shaped spring, the friction pins are held under 10 pressure against the plunger at diametrically opposite points so as to equalize the resistance applied to the plunger in opposing directions. The

equal forces applied to the friction pins by the spring and the fact that the ends of the pins are 15 concaved prevent movement of the plunger against the cylinder wall in a direction at right angles'. to the line of pressure applied by the pins 52,-and assures an absolutely direct or straightline travel for the plunger. Moreover, it main- 20 tains the plunger in any positionlwithin the cylinder at which it may be stopped, until force is applied Vto the plunger in an upward or downward direction by suitable actuating means.

Y Forthe actuating meanswe utilize a shaft 54, 25 which has suitable bearing in therends walls of the oil casing or container Il, and in order that the lubricating device maybe actuated either manually or mechanicallysaid shaft extends out f y 40 YTo the opposite projecting end of the shaft 54, a vcrank arm 58 may be secured, which may be caused to travel in a circular path, or through an arc of a circle, suitable connection with an operating medium being made for this purpose. 45 Any other Yway of mechanically rotating the shaft 54 may, however, be resorted to. On the shaft 54 within thercasing l I, a cam or cams are arranged, the cam or cams being 'secured to the shaft in any approved manner so as to rotate 50 therewith.V Although our improved lubricating pump will generally include more than a single pumping elementl or unit, there will, of course, be actuating'mechanism for each such element OI' unit'. 55 Straddling the cam 59, or each cam, as the case may be, is an actuator yoke $3 which has a lateral extensionV 6I in which is adjustably threaded a screw studV 62 extending axially from the lower end of an actuator sleeve 33. Said actuator sleeve is guided on a guide pin 54 extending through the pump casing 2i from its upper end; said guide pin being rotatably mounted in said pump casing and having at its upper end a head 55 which bears against the upper side of Said casing and has a 65 kerf 66 formed therein to permitof its being easily rotated by applying a screw-driver or other suitable tool thereto. Any other form of head may be used so long as the guide pin can be rotated with- Yin the pump casing. Y lIn order to maintain the 70 head 65 of the guide pin rmly against the upper surface of the pump casing, a washer (il is applied to the guide pin, and aspring disk 68 interposed betweenthe washer and the under side of the pump casing; said Washer 6l being held 75 against downward rnovementiby a. cotter or other' pin passed through the guide pin.

At the lower end of the. guide pin a key pinl1i0 is arranged, said key pin being passed diametri# cally through the guide pin and' projecting from opposite sides thereof. The actuator sleeve |53` is provided with vertical slots 1| at diametrically opposite points which extend downwardly from the upper end of said sleeve a considerable dis-- tance; and the projecting ends of the key pin 1D? are entered in said slots,.so-that upon rotation of the guide pin within the pump casing', the'actu'-n ator sleeve 632 wi-ll be rotated, moving simultaneously therewith either downwardly or upwardly along the guide pin. In thismanner the space between the under side of thev actuator sleeve and the actuator yoke is either enlarged or diminished in size. The actuator sleeve 63 is adapted to bear against the upper sideof the outstanding flange1 on the piston plunger 48, and to assure a firmcon` tact of said actuator sleeve against said outstanding ange over a considerable area, said sleeve is also provided with an outstanding flangey or contact element 12 at its lower end which over-Va lies the contact flange of thepiston plunger 481, as clearly shown in Fig. 2.

In the pump casing 2|, an angular passage'13isl arranged, one end opening into the oil wellg21 above the valve 33', and its other end opening toy the upper surface'of' the pump` casing, at which point a gooseneck pipe l is connected thereto, the inlet end of said pipe being threaded or otherwise secured in the upper end of said angular passage, while the outlet end thereof terminates a distance above the upper surface of the pump casing.

Directly beneath the outlet end of said gooseneck pipe; a well 'i5 is formedin the pump casing,` and opening into'the bottom of this well is the vertical member or portion of anangular passageY 16, the horizontal member or portion of which opens into the bore 25, thelower portion of which serves as a cylinder for a piston plunger 11 secured to the actuatoryoke Ell. The pistonplungerV serves as' the primary plunger whiler the piston. plunger 11 serves as a secondary or feeding plunger. The horizontal member or portion of the angular passage 1-6 opens into` thev bore 25-A above the secondary or feeding plunger'11'.

The bore 25 has a stepped enlargement at its' upper end, the upper portion of? said enlargement being screw-threaded .to receive a coupling Y18 having an axial passage 19 therethrough and in the space between said coupling and a shoulder 8S formed in the bore,` a predetermined distance above the outlet of .the angularv passage 16 renewable or replaceable valve cages 8|', 82 are arranged. These cages are disposed one above the. other, the upper lying in contact with the lower, and the lower receiving support from thel shoulder Sii. The upper cage enters a depression 83` formed in the under face of the coupling 18.

Each of these valve cages is bored axially and counterbored, and in the wall of the counter'- bored portion, resilient valve retainers Mare arranged, each valve retainer being formed of wire curved into open ring form, asY at 85', Fig. 10, and the ends of the wiresv being directed inwardly toV provide resilient ngers S5 which bear against ball valves 81l arranged inthe valve cages and seated in the smaller portions of the bores of said cages, which portions arel flared upwardly to prevent the ball valves passing therethrough, yet allow them to enter the flared smaller portions of the bores-a predetermined distance and thus make atightt" tof guard against thepassage of` oil up'" wardly beyond the same, except under the appli-v cati-cnetpressure applied'to the oil underneath, v'vifiichV willcause the ballsrto rise and the` fingers. 8@ of theslvalve: retainers to flex. The open-ring portions of these valve Vretainers, are held in grooves formed in thev valve cages and saidv retainers. maintain the ballfvalves against their seats. When pressure is applied to the ball valves fromrbeneath, theybecomerlifted'suiciently from their seats to permit the passage of oil upwardly into the coupling 18; and' through the latter and its connection tox the poi-ntor points at-whi'ch it is to be applied 'for properly lubricating some machine part or parts. For this purpose, a delivery tube 88 used as such connection is inserted intothe upper end of the coupling 18 and held clamped thereto in a liquid-tight man-ner by means of arr oppositely-tapered nipple or sleeve E@ and a cap 96 threaded onto the coupling, which forces said' nipple or sleevey tightly around the pipe 85 and alsov tightly against the coupling and the cap.-

We have protected the wells 15 formed in the pump casings 2|? from dust and dirt, by placing over the same a transparent hood 9|, preferably formed of` glass and, if desired, this hood may' have air-,tight contact with the pump casings by; securingit thereto in any approved manner.

The guide pin 64 and actuator sleeve 63 jointly serve as a feed regulating device, since upon rotating said guide pin in one direction-say clockwise-the screw stud 62 at the lower end of the sleeve will be moved upwardly Within the lateral extension or arm 6| of the actuator'yoke. This results in the lower end of the actuator sleeve, or more particularly the ange of saidV sleeve, moving out of contact with the flange 49; on the primary piston plunger, which may also be referred toa-s a'feed-regulating plunger. Y

When rotating the guide pin 64 in the opposite direction, or counter-clockwise, thescrew stud E? ofthe actuator sleeve will bev lowered Withinr the extension or arm of theA actuator yoke B5, and during this action the piston plunger I8 will be lowered with it.

It may herebe stated that` the bore through the nipple 3,1, the port A36, a portion of the bore 25, the angular'passage 13;, the gooseneck pipe 14, the welly 15, the angular passage 16, a portion of they bore 25, the bores through the valve cages 84- and 812, Yand the borein the coupling 18 constitute an oil conduit, to one end of which the inlet pipe'39' is secured, and to the other endof which the outlet or feed pipe 88 is secured. It will, of course, be lunderstood that certain portions of this conduit ror passage with extensions thereofare utilized as cylinders for the primary-4 or feed-regulating piston plunger 48 and the secondary or feeding plunger 11.

ItY is tofbe.l noted. that the regulationof the length of. the stroke of the primary or feed-regu-v lating.` pis-tonplunger 48v in an upward direction determines the quantity of oil to be delivered out through the'delivery tube 88. Consequently, the loweringof said piston plunger results in an added quantity' of oi'lbeing delivered from the lubricating device; the quantity of oil delivered being in exact accordance with the range of upward movement of said piston' plunger.

To guard against the ball valves 81' rising within 'cages and closing. the conduit portions;

directly beyond, or as shown, above,` in the event' thatfl the resilient fingers' becomebroken, We

have provided means to by-pass thefoil around the Valve. Y i l' As clearly shown in Figs. 2 and'8, the inner wallY of the depression 83 formed in the under face of the coupling 18 is provided with a diametral groove 92, which intersects the inlet of the bore 19. in said coupling.V If for any reason the fingers B6 of the resilient valve retainer 84 become broken in the upper valve cage, :the valve 81 thereinrrising and engaging the coupling will be of insum- We have provided the u nder side of the upperV valve cage 8| with a similar diametral groove 93, which intersects the bore of said valve cage so that in the event the resilient ngersbecome broken, oil will pass Vupwardly through the upper valve cage, even though the valve 81 in the l'ower cage rises against the upper Valve cage .and closes the bore thereof; the actionbeing exactlyfas described with reference to the -vdiametral groove 92 in the depression of the coupling 18.

In order that all valve cages may be made alike and be replaceable, we have illustrated in Fig. 8 the arrangement of by-passes just described, and in addition thereto, such a by-pass or diametral groove 94 is also provided -in the Vunder side of the lower valve cage 82. While, when so used, the by-pass in the lower valve cage serves-no purpose, as there is no valve beneath it capable of closing the passage therethrough, it, however, dispenses with the use of valve cages of twordifferent constructions, and they therefore may be used interchangeably; each valve cage being usable either as the upper or lower cage.

Itis, of course, understood that anyrnumber of pumping units or elementsmay be employed,

and that they will all operate in the same manner; the shaft 54 having a cam mounted thereon for each pumping Vunit or element.Y An explanation of the operation of a single unit will thereforeV suice for all.

Upon rotation of the shaft 54, the VVcam 59 there-f on will be rotated, and as this cam, which is in the form of a disk, is eccentricallymounted on the shaft, it will cause the actuator yoke 60 to move `upwardly and downwardly in a vertical plane,

this being due to the piston plunger 'l1 and actuator sleeve v63 being secured thereto and serving as guides to restrict the actuator yoke to a straight line movement. 'I'he upward and downward Y movement of this actuator yoke results in a. corresponding movement Vof the actuator sleeve |33v and of the piston plunger '|'I,Vand'asv the lower` end Yof, the sleeve 83 overlaps the flange 49 on the primary or feed-regulating piston plunger 48, said piston plunger is caused to, move downwardly with the actuator sleeve; during which movement the valve 3,3 is drawn rmly against itsA seat under suction created in the cylinder above said piston plunger, which also draws-upon the ball valve 38 and unseats it so thatV oil is drawn upwardly through the valve cage 4l and inlet pipe 39, and into the cylinder above the piston plunger 48,

thus completely filling the space above said pistonV plunger., During the upward movement of the actuator yoke, the actuator sleeve 63 is'moved out of engagement with the primary or feed-regulating piston plunger 48, which is retained in its lowermost position by thespring retainer device 50;

j The actuator yoke moves upwardly idly a predetermined distance before engaging the piston plunger 48, after which further upward movement of said actuator yoke will raise said piston Y -gooseneck pipe 14 into the well 15 of the angular passage 76, vthe oil then enters the cylinder above the feeding piston plunger 11, which during its upward strokel forces the oil through the valve,` cages, out through the outlet coupling 18 and, into the delivery pipe 88, which directs it to the desired point or points to be lubricated.

It is, ofcourse, understood that the accumulation of oil within the angular passages 16 and 13 is drawn into the'cylinder of the feeding piston plunger 'Vry upon the downward stroke of said plunger.:

Our invention is susceptible to various changes or modifications, manyof which fall fully Within the scope of the appended claims without departing from the spirit of our invention or sacrificing any of the advantages thereof.

Having'thus described our invention, what vwe claim is: Y Y

1. In an'oil pump, the combination of a cylinder, a piston plunger reciprocable within said cylinder, means for actuating said piston-plunger with lost motion between the two, and a friction device engaging said piston plunger peripherally at diametrically opposite points only.

.2. In an oil pump, the combination of a cylinder, a piston plunger reciprocable within said cylinder, actuating. means for reciprocating said piston plunger with lost motion between the two, and a friction device carried by said cylinder acting against said piston plunger at diametrically opposite points thereof.

40 3.V In an oil pump, the combination of a cylinbetween the two, and a friction device includinga spring having friction pins passed through the wall of 'said cylinder at diametrically opposite pointsV and engaging said piston plunger to exert pressurethereagainst from 'opposite directions.

5. In an oil pumpgthe combination of a cylinder having openings through its wall at diametrically opposite points, a piston plunger reciprocably arranged in said cylinder, actuating means for reciprocating said piston plunger with lost motion between the two, a U-shaped spring straddling said cylinder and having friction pins at its extremities passed through said openings and engaging said piston plunger at diametrically opposite points, saidpins within said openings serving as'the only means of supporting said U- shaped spring.

6. In an oil pump, the combination with a cyl- VVinderrhaving openings through its wall at diasaid cylinder and having friction pins at its extremities passed through said openings, and engaging said piston-plunger at diametrically opposite points, said pins having co-ncaved end faces engaging said piston-plunger.

7. In an oil pump, the combination of a cylinder having an oil inlet and an oil outlet, a

piston plunger reciprocable within said cylinder and having a predetermined range of movement therein to pump a predetermined quantity of oil therefrom, means for actuating said plunger Within said cylinder, and a self-adjusting friction device engaging said plunger at diametrically opposite points allowing movement of said plunger only under force applied thereto by said actuating means.

ADOLPI-I W. F. MANZEL. WILLIAM C. H. PFEIL. 

